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I use the Bluetooth for soc. In reality I almost never check it. I only look to see how the batteries cells are balanced every once and a while. Most of the time it is connected to the system and is ready to go farther than you are.

I use the bms for state of charge. I have a dc to dc converter for the 12v components and no fuses or breaker because I'm an idiot who somehow never thought about this until now.

Really nice build. I watched and liked your video, it is much more entertaining than mine.

I don't know if it would qualify since it is removable.

Don't know if this will help but here's what I built. https://diysolarforum.com/threads/diy-230ah-eve-mobile-battery-aka-ezgo-golf-cart.40927/

I have 230 ah cells with a 300 amp bms . It has a top speed of 35mph and has about 100 miles of range if you drive with efficiency in mind. My cart pulls 200+ amps at a full throttle standing start. When it is connected to my solar it is doing very light duty in comparison. Here's the video I...

I bring cabinets like these to the scrap yard on a regular basis. The are so large no one seems to want them in my area.

It's a old control cabinet I got from a job. I rebiuld controls for machines. Here's some pictures of my biuld. https://diysolarforum.com/threads/4-mpp-lv6548-30-kw-eve-304ah-lifepo4-battery-14-kw-pv-array.32343/post-449279

Thread 'DIY 230Ah EVE Mobile Battery (aka) EZGO Golf Cart' https://diysolarforum.com/threads/diy-230ah-eve-mobile-battery-aka-ezgo-golf-cart.40927/ This is what I built. I have it installed so it can run as part of my system.

Thanks for the compliment. I put the batteries in the 1/8 steel enclosure for fire safety. I never worried it might contain the off gas too well and cause another problem.

https://www.pv-magazine.com/2023/10/30/cause-of-30-kwh-battery-explosion-in-germany-remains-unclear/ Just reading about this event in Germany. I have this setup in my shop. Now I am wondering if I should think harder about venting or take this story with a grain of salt.

You normally want it as close as possible to the meter to have the shortest amount of parallel paths it can return to the transformer on.

Thread '4 MPP LV6548 / 30 kW EVE 304ah LiFePO4 battery/ 14 kW PV array' https://diysolarforum.com/threads/4-mpp-lv6548-30-kw-eve-304ah-lifepo4-battery-14-kw-pv-array.32343/ This is a very similar system. Hope you can see something that will help.

I used a 1/8 steel control cabinet to store my cells. I don't think there is a tremendous risk of fire, but it doesn't hurt to over build if practical.

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Not sure but maybe this will help. I had problems with miy older lv6548. This is what I did. Post in thread '4 MPP LV6548 / 30 kW EVE 304ah LiFePO4 battery/ 14 kW PV array' https://diysolarforum.com/threads/4-mpp-lv6548-30-kw-eve-304ah-lifepo4-battery-14-kw-pv-array.32343/post-766465

This is the build on this forum. Thread 'DIY 230Ah EVE Mobile Battery (aka) EZGO Golf Cart' https://diysolarforum.com/threads/diy-230ah-eve-mobile-battery-aka-ezgo-golf-cart.40927/

This may interest you. I have a friend with a Polaris. We're going to convert it with a 304 pack.

Not sure if this will help but it worked for me. Post in thread '4 MPP LV6548 / 30 kW EVE 304ah LiFePO4 battery/ 14 kW PV array' https://diysolarforum.com/threads/4-mpp-lv6548-30-kw-eve-304ah-lifepo4-battery-14-kw-pv-array.32343/post-766465

In my shop inside a metal enclosure. I hope it is overkill but better safe than sorry.

It's like deja vu all over again.

What is the voc for the panels? You need to keep the voltage as high as possible without going over the max input voltage. Keep in mind that the voltage will increase under cold conditions. Your max amps input will clip at 20.

My system has 4 lv6548. The max input voltage is 250v. You want to base that number off of the VOC of the panels. This is my build if you're interested. Thread '4 MPP LV6548 / 30 kW EVE 304ah LiFePO4 battery/ 14 kW PV array'...

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I would have been doomed if it were not for youtube. The first two inverters did fine on the firmware update with the cable that came with the units. The second older to units not so much. Fortunately a youtube video explains how to add a 3.3k resistor in order to make them work.  The next...

Had to relocate all my DC distribution blocks on order to be able to make all the cables equal length. I also made room for the next battery that will inevitably find it's way into the cabinet.

I just started rebuilding my system. I have went back and forth but after running the system both ways I decided on a common neutral configuration. Here's the link to the complete build if you're interested in the whole thing...

Distribution block for AC output. The next step makes me nervous. I have to update the firmware on all the inverters to make them able to work together.

Success! I think I would rather pull 3 pieces of 2/0 wire through a1/2 conduit than put those communication cables back through that plastic wire cover.

Lord I forgot how much fun it is to try and hide these god awful communication cables.

This was an Item that came from a plant I do work for. I would only use three of the four poles on the transfer switch. It is a prebuilt unit. But the switch by itself runs around $1100...

Should have done this to start with.

New transfer switch.

Why build it once when you can build it twice?

I'm not sure. I never looked into a 72v system.